Drilling tool



FIG. 1 is a side view of a drilling tool according to an embodiment of the present invention;

FIG. 2 is a side view of the drilling tool of FIG. 1 turned 90° about its axis;

FIG. 3 is a top, perspective view of the drilling tool;

FIG. 4 is a top, perspective view of the drilling tool;

FIG. 5 is a bottom, perspective view of the drilling tool;

FIG. 6 is a bottom, perspective view of the drilling tool; and,

FIG. 7 is a top view of the drilling tool.

Broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a drilling tool, as shown and described. 